how to check how much timing?

[turboolds]

how do i see how much timing is set in car and how do i adjust, if i want to pull or add timing?

[joecar]

TO, welcome... :cheers:

Are you using an LS1 PCM...?

Using scantool log SPARKAVD and ASPARK;

SPARKAVD is the ignition timing advance;
ASPARK is the sliding weight/percentage between HO/LO timing tables;

Using tunetool, look at tables B3913 (HO timing) and B3914 (LO timing).

(If you haven't already, from the tunetool read the flash from the PCM and save to file on your laptop).